path: root/cmd/mist/assets/examples/coin.html


          
<!doctype>
<html>
<title>JevCoin</title>
<head>
<script type="text/javascript" src="../ext/bignumber.min.js"></script>
<script type="text/javascript" src="../ext/ethereum.js/dist/ethereum.js"></script>
</head>
<body>

<h1>JevCoin <code id="contract_addr"></code></h1>
<div>
    <strong>Balance</strong>
    <span id="balance"></strong>
</div>

<div>
    <span class="amount">Amount:</span>
    <input type="text" id="address" style="width:200px">
    <input type="text" id="amount" style="width:200px">
    <button onclick="transact()">Send</button>
</div>

<hr>

<table width="100%" id="table">
    <tr><td style="width:40%;">Address</td><td>Balance</td></tr>
    <tbody id="table_body"></tbody>
</table>

</body>

<script type="text/javascript">
    var web3 = require('web3');
    var eth = web3.eth;

    web3.setProvider(new web3.providers.HttpSyncProvider('http://localhost:8545'));
    var desc = [{
        "name": "balance(address)",
        "type": "function",
        "inputs": [{
            "name": "who",
            "type": "address"
        }],
        "constant": true,
        "outputs": [{
            "name": "value",
            "type": "uint256"
        }]
    }, {
        "name": "send(address,uint256)",
        "type": "function",
        "inputs": [{
            "name": "to",
            "type": "address"
        }, {
            "name": "value",
            "type": "uint256"
        }],
        "outputs": []
    }, {
        "name":"received",
        "type":"event",
        "inputs": [
            {"name":"from","type":"address","indexed":true},
            {"name":"amount","type":"uint256","indexed":true},
        ],
    }];

    var address = localStorage.getItem("address");
    // deploy if not exist
    if (address == null) {
        var code = "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";
        address = web3.eth.transact({data: code});
            localStorage.setItem("address", address);
    }
    document.querySelector("#contract_addr").innerHTML = address.toUpperCase();

    var contract = web3.eth.contract(address, desc);
    contract.received({from: eth.coinbase}).changed(function() {
        refresh();
    });

    eth.watch('chain').changed(function() {
        refresh();
    });

    function refresh() {
            document.querySelector("#balance").innerHTML = contract.balance(eth.coinbase);

        var table = document.querySelector("#table_body");
        table.innerHTML = ""; // clear

        var storage = eth.storageAt(address);
        table.innerHTML = "";
        for( var item in storage ) {
            table.innerHTML += "<tr><td>"+item.toUpperCase()+"</td><td>"+web3.toDecimal(storage[item])+"</td></tr>";
        }
    }

    function transact() {
        var to = document.querySelector("#address").value;
        if( to.length == 0 ) {
            to = "0x4205b06c2cfa0e30359edcab94543266cb6fa1d3";
        } else {
            to = "0x"+to;
        }

        var value = parseInt( document.querySelector("#amount").value );

        contract.send( to, value );
    }

    refresh();
</script>
</html>

<!--
contract JevCoin {
    function JevCoin()
    {
        balances[msg.sender] = 1000000;
    }
 
    event changed(address indexed from, address indexed to);
    function send(address to, uint value)
    {
        if( balances[msg.sender] < value ) return;
 
        balances[msg.sender] -= value;
        balances[to] += value;
 
        changed(msg.sender, to);
    }
 
    function balance(address who) constant returns(uint t)
    {
        t = balances[who];
    }
 
    mapping(address => uint256) balances;
 }
-!>